[LU-17946] sanity test_818: watchdog: BUG: soft lockup - CPU#1 stuck for 22s! umount

• Type: Bug
• Resolution: Duplicate
• Priority: Minor
• Affects Version/s: Lustre 2.15.5
• Severity: 3
• Assignee: Hongchao Zhang
• Reporter: Maloo

Description

This issue was created by maloo for Minh Diep <[e-mail]>

This issue relates to the following test suite run: https://testing.whamcloud.com/test_sets/d97d6433-1fe3-4576-a025-4b134fd8430c

Test session details:
clients: https://build.whamcloud.com/job/lustre-b2_15/88 - 5.14.0-427.18.1.el9_4.x86_64
servers: https://build.whamcloud.com/job/lustre-b2_15/88 - 4.18.0-477.27.1.el8_lustre.x86_64

<<Please provide additional information about the failure here>>

CPU: 1 PID: 583874 Comm: umount Kdump: loaded Tainted: G OE --------- - - 4.18.0-477.27.1.el8_lustre.x86_64 #1
Hardware name: Red Hat KVM, BIOS 0.5.1 01/01/2011
RIP: 0010:__memset+0x24/0x40
Call Trace:
ptlrpc_service_purge_all+0x422/0xa80 [ptlrpc]
ptlrpc_unregister_service+0x422/0x940 [ptlrpc]
mds_stop_ptlrpc_service+0x69/0x1b0 [mdt]
mds_device_fini+0x28/0xd0 [mdt]
class_cleanup+0x6f5/0xc90 [obdclass]
class_process_config+0x3ad/0x2080 [obdclass]
class_manual_cleanup+0x469/0x770 [obdclass]
server_put_super+0xc76/0x1330 [obdclass]
generic_shutdown_super+0x6c/0x110
kill_anon_super+0x14/0x30
deactivate_locked_super+0x34/0x70
cleanup_mnt+0x3b/0x70
task_work_run+0x8a/0xb0
exit_to_usermode_loop+0xef/0x100
do_syscall_64+0x19c/0x1b0

Issue Links

• duplicates: LU-17249 protect scp_rqbd_idle list operations in ptlrpc_service_purge_all()
• is related to: LU-9900 conf-sanity test_46a: soft lockup on MDS when umount
• is related to: LU-17953 sanity test_60a: MDS crash during umount
• is related to: LU-17249 protect scp_rqbd_idle list operations in ptlrpc_service_purge_all()